MeasureThat.net

Run results for: undefined vs. typeof vs. in vs. hasOwnProperty

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Mobile/15E148 Safari/604.1
Mobile Safari 14
iOS 14.2
Mobile
3 years ago
Test name Executions per second
undefined 2155200.0 Ops/sec
typeof 5408935.0 Ops/sec
in 5251221.0 Ops/sec
hasOwnProperty 5307127.0 Ops/sec
bool 5438868.5 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

;